/*广告页面*/
.header{
    height: 44px;
    line-height: 44px;
    text-align: center;
    background-color: #fff;
}
.content{
    background-image: url(../img/advertisement-bg.jpg);
    background-size: 1280px;
    background-position: center;
}
.count-down{
    position: fixed;
    right: 14px;
    top: 74px;
    width: 106px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    border-radius: 20px;
    background-color: #fff;
}
.slogan{
    position: fixed;
    bottom: 200px;
    left: 50%;
    height: 40px;
    font-size: 26px;
    transform: translate(-50%);
    line-height: 40px;
    color: #fff;
    animation: slogandown 2s linear forwards;
}
@keyframes slogandown{
    0%{
        opacity: 0;
        bottom: 250px;
    }
    100%{
        opacity: 1;
        bottom: 100px;
    }
}